package com.xzkydz;


import com.xzkydz.sensor.utils.SensorLogger;

import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class SerialPort {
    private static final String TAG = "SerialPort";
    private FileDescriptor mFd;
    private FileInputStream mFileInputStream;
    private FileOutputStream mFileOutputStream;

    public SerialPort(File device, int baudrate, int flags) throws SecurityException, IOException {
        if (!device.canRead() || !device.canWrite()) {
            try {
                Process su = Runtime.getRuntime().exec("/system/bin/su");
                String cmd = "chmod 777 " + device.getAbsolutePath() + "exit\n";
                su.getOutputStream().write(cmd.getBytes());
                if ((su.waitFor() != 0) || !device.canRead() || !device.canWrite()) {
                    throw new SecurityException();
                }
            } catch (Exception e) {
                e.printStackTrace();
                SensorLogger.d("SerialPort: " + e.getMessage());
                throw new SecurityException();
            }
        }
        mFd = open(device.getAbsolutePath(), baudrate, flags);
        if (mFd == null) {
            SensorLogger.e("native open returns null");
            throw new IOException();
        }
        mFileInputStream = new FileInputStream(mFd);
        mFileOutputStream = new FileOutputStream(mFd);
    }

    public InputStream getInputStream() {
        return mFileInputStream;
    }

    public OutputStream getOutputStream() {
        return mFileOutputStream;
    }

    // JNI路径
    private native static FileDescriptor open(String path, int baudrate, int flags);

    public native void close();

    public native static String stringFromJNI();

    static {
        System.loadLibrary("SerialPort");
    }

}
